Wisconsin Statutes Taxation (Ch. 70 to 79) § 71.71. Wages subject to withholding

(1) Statement employer must furnish to employee. (a) Every person, partnership or limited liability company required to deduct and withhold from an employee under the general withholding provisions of subch. X shall furnish to each such employee in respect of the remuneration paid by such person, partnership or company to such employee during the calendar year, on or before January 31 of the succeeding year, or if his or her employment is terminated before the close of any such calendar year on the day on which the last payment of remuneration is made, 2 legible copies of a written statement showing the following:

(b) The employee shall furnish the department of revenue one copy of such written statement along with his or her return for the year.